Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/189120
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Giant reversible magnetocaloric effect in the pyrochlore Er2Mn2O7 due to a cooperative two-sublattice ferromagnetic order |
Autor: | Cai, Y. Q.; Jiao, Y. Y.; Cui, Q.; Cai, J. W.; Li, Y.; Wang, B. S.; Fernández-Díaz, M. T.; McGuire, M. A.; Yan, J. Q.; Alonso, J. A. CSIC ORCID; Cheng, J. G. | Fecha de publicación: | nov-2017 | Editor: | American Physical Society | Citación: | Physical Review Materials 1(6): 064408 (2017) | Resumen: | Most magnetic refrigeration materials showing a large and reversible magnetocaloric effect (MCE) undergo a second-order ferromagnetic (FM) transition involving large-moment magnetic species on one sublattice. A stronger MCE is expected near a cooperative FM order of two or more magnetic species with large magnetic moments residing on different sublattices, but experimental realizations are rare. Here we report on the discovery of large MCE in the cubic pyrochlore Er2Mn2O7 near its second-order FM transition at Tc≈34K; under the magnetic field change of 1 and 5 T, the maximum magnetic entropy change -ΔSM is 5.27 and 16.1Jkg-1K-1, and the estimated magnetic refrigerant capacity reaches 68 and 522Jkg-1, respectively. These latter values are among the largest for the known MCE materials. The observed giant and reversible MCE in Er2Mn2O7 is mainly attributed to the large saturation moment of 18.9μB per formula unit owing to a simultaneous FM ordering of the rear-earth Er3+ and transition-metal Mn4+ localized moments. Our results suggest that Er2Mn2O7 pyrochlore is a promising candidate for magnetic refrigeration applications in the temperature range 20-80 K. More importantly, this work provides a new material system for developing high-performance MCE materials that can exhibit a strongly coupled FM transition involving two magnetic sublattices of large local moments in a single-phase material. | Versión del editor: | https://doi.org/10.1103/PhysRevMaterials.1.064408 | URI: | http://hdl.handle.net/10261/189120 | DOI: | 10.1103/PhysRevMaterials.1.064408 | Identificadores: | doi: 10.1103/PhysRevMaterials.1.064408 e-issn: 2475-9953 |
Aparece en las colecciones: | (ICMM) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
accesoRestringido.pdf | 15,38 kB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
SCOPUSTM
Citations
28
checked on 16-abr-2024
WEB OF SCIENCETM
Citations
24
checked on 25-feb-2024
Page view(s)
134
checked on 19-abr-2024
Download(s)
29
checked on 19-abr-2024
Google ScholarTM
Check
Altmetric
Altmetric
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.